Water heater or boiler



Aug. 23,1927. 1,640,284

L. J. MITCHELL WATER HEATER OR BOILER Fipd April l2, 1926 2 Sheets-Sheetl 1,640,284 Aug- 23 1927' 1 J. MITCHELL WATER HEATER 0R BOILER FiledApril 1 2, 1926 2 Sheets-#Sheet 2 /7 I: l /Z /5 5 o o o o '4/5- y? r; 6/f T Al Y X T 4 0 '9 75 Vro 79 g/ 75 Z0 A Q G Invemfor ko (y o Q O O CJJM/feite# '1 l By m m Attorney Cil vmum amount of steam with PatentedAug. 23, 1927.

UNITED STATES LEWIS JOI-IN MITCHELL, OF WARREN, OHIO.

WATER HEATER on BOILER.

Application filed April 12, 1926. Serial No. 101,408.

The present invention relates to a water heater or boiler and aims toprovide a structure wherein it is possible to heat a maximum amount ofwater or generate a maxia minimum amount of heat.

Another important object of the invention is to provide a device of thisnature which is exceedingly simple in its construction, inexpensive tomanufacture, strong, durable, thoroughly reliable, and efficient, andotherwise well adapted to the purpose for which it is designed.

Heretofore, it has been the practice to heat water or generate steam byheating a coil or passing heat through a plurality of relatively smallflues, and this is the practice to-day that is most prevalent. l amaware that attempts have been made to use a single vertical flue with aboiler disposed thereabout, but little or no practical success has beenattained.

My invention contemplates the necessary improvement to insure successwith a vertical flue extending through the boiler.

TWith the above and numerous other objects in view as will appear as thedescription proceeds, the invention resides in certain novel features ofconstruction, and in thev combination and arrangement of parts as willbe hereinafter more fully described and claimed.

In the drawing,

Figure 1 is vertical section through the device of my invention, showingit used with a water heater.

Fig. 2 is a horizontal section therethrough, taken substantially on theline 2 2 of Fig. 1.

Fig. 3 is a fragmentary elevation showing the upper port-ion thereofwith a part broken away, and

Fig. t is a vertical section through an embodiment of the inventionusedwith a boiler.

Referring to the drawing in detail, it will be seen that 5 designates acylindrical drum having a head 6 in the upper end thereof and fixedthereto by means of rivets 7 or in any other suitable manner.V This head6 is provided with a central opening 8. The drum is provided with anopening 9 adjacent the lower end thereof for receiving a water inletpipe 10. The head is provided with an opening 11 for receiving a wateror steam outlet pipe 12. A single :truste-conical shaped flue tube 13extends co-axially through the drum 5, the upper end of the tube 13passing through the opening 8 and terminating in a cylindrical portiondesignated specifically by the numeral 14. A iiange about the opening 8is securely riveted or otherwise fastened to the upper portion of thetube 13 as is indicated at 15. The lower end of the tube 13 is securely`riveted or otherwise fastened to the lower end of the drum 5 as isindicated at 16.

A rod or bolt 17 extends diametrically across and passes through thesides of the cylindrical portion 111. A hanger in the form of an eyebolt 13 has its eye portion 19 encircling the bolt 17. The bolt 18depends into the tube 13 terminating apslight distance below the head 6.A baffle B is suspended from the hanger 18 in the tube 13. This bafiieincludes a frusto-conical shaped wall 2O disposed col-axially with thetube 13 and being equally spaced from said tube 13 throughout itslength.

rlhe upper end of the frusto-conical shaped portion 20 is closed by theplate 21. The hanger bolt 13 passes through the center of the yplate 21and a nut 22 is engaged on the end of the bolt, said nut beingpreferably formed as a part of said plate. An inverted cone-shapedspreader bottom 23 is formed on the bottom end of the portion 20. P

A plurality of spacing lugs 24 are riveted as at 25 to the lower end ofthe portion 20 and similar spacing lugs 26 are riveted as at 27 to theupper end of said portion 20. These spacing lugs 24 and 26 are adaptedto engage the inside of the flue tube 13. The hollow baffle B isprovided with suitable vent openings' 28, preferably at the top end ofthe portion 20.

An opening 29 is provided in the bottom portion of the drum 5 forclean-out purposes and is normally closed by a plug 30. A plurality offrusto-conical flanges 31 are disposed about the outside periphery ofthe portion 2O in spaced relation to each other, the sizes of theseflanges gradually decreasing from the bottom of the portion 20 to theupper end thereof.

In Fig. 1 I have shown the device in an embodiment las a water heater,wherein a gas burner or the like 32 may be utilized in the bottom of thetube 13. The flames Will shoot up from the jets 33, and heat Will bedeflected by the spreader bottom 23 and the heat Will be retarded in itsupward passage .a through the flue tube 13 by the flanges 31,

so that the Water in the drum 5 and about the tube 13 will be heated.

It is to be noted that there is no danger of the tube burning out. InFig. a I have shown the device used as a boiler, it being noted thatthere are provided a greater number of the iianges 31 which are disposedin closer proximity. Furthermore, the inlet opening 9 is located closerto the bottom ot the drum. Except tor proportions, this: boilerembodiment is identical With the Water heater embodiment.

It is thought that the construction, operation, utility, and advantagesot this invention Will noW be clearly understood Without a more detaileddescription thereof. The present embodiment olI the invention has eendisclosed in detail, since in actual practice it attains the features ofadvantage enumerated as desirable in the statement of the invention andthel above description. It will be apparent that changes in the detailsof construction, and in the combination and arrangement ot parts may beresorted to Without departing trom the spiritor scope of the inventionas hereinafter claimed, or sacrificing any of its advantages.

Having thus described my invention, what I claim as new is :w Y

1. A device ot the class described including, in combination, a casing,a flue tube of irusto-conical formation in the casing and formingtherewith a fluid circulating chamber, a bolt extending transverselyacross the upper end ot the tube, an eye bolt receiving the first boltand depending therefrom, a hollow :trusto-conical shaped baffle having aclosed top through 'Which passes the second bolt for suspending thebatlle in the tube, and a heating element Vbeneath the battle.

2. A device of the class described including, in combination, a casing,a Vflue tube of trusto-conical formation in the casing and formingtherewith a fluid circulating chamber, a bolt extending transverselyacross the upper end of the tube, an eye bolt ceiving the irst bolt anddepending there-l from, a hollow rusto-conical shaped'batlie having aclosed top through which passes the second bolt for suspending thebattle in the tube, the bottom ot the baffle being closed, said bottombeing of a substantialV inverted conical formation, a plurality oftrusto-conical flanges disposed about the hollow baille, and a heatingelement beneath the battle.

In testimony whereof I afix my signature.

LEWIS JOHN MITCHELL.

